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CNN  — 

Sylwia is constantly being watched – first by her 600,000 Instagram followers, then by a man parked outside her apartment.

If you are fascinated by the landscape of internet celebrity and what lurks beneath, the Polish thriller “SWEAT” – part of the official selection at Cannes Film Festival 2020 – should leave you reeling.

Out in theaters in June and available on arthouse streaming service MUBI next month, the film takes a time-honored trope about the pitfalls of fame – loneliness, crumbling interpersonal relationships, a desperate need for validation – and modernizes it through the lens of social media influencing.

A strained relationship with her mother pushes Sylwia to search for support online.

The film follows Instagram-famous fitness guru Sylwia, played by Magdalena Koleśnik, as she moves through her daily influencer duties, wearing a seemingly endless rotation of hot pink athleisure. From opening mountains of free publicity packages to live-streaming the creation of her favorite protein smoothie, almost every mundane second of Sylwia’s life is broadcast to her army of fans.

“Emotional exhibitionists fascinate me, probably because I am on the opposite side of that spectrum,” said screenwriter and director Magnus von Horn in a statement.

Von Horn’s observations of his own social media feed helped inform Sylwia’s character.

“I couldn’t stop watching fitness motivators and the way they made their lives into reality shows,” he said in a recorded interview with MUBI. “I felt like I got to know them on some level because they shared so much of their everyday life. Twenty videos of a dog playing with a rubber toy and then an emotional speech about love problems. That’s why I watched them. It was provocative, I both hated and loved them.”

When she inevitably shares too much, Sylwia is brutally reminded that online actions can have real-world consequences. A vulnerable recording of Sylwia crying gives her devoted supporters a false sense of intimacy and, when one obsessive fan tracks down where she lives, compromises her safety. There is no screen to hide behind and she is forced to confront the danger of these parasocial relationships head-on.

The heartracing thriller holds parasocial relationships up to the light.

The show must go on

Much like influencing, the world of fitness is high energy. When we first meet Sylwia, she is hosting a dynamic in-person workout session for a crowd that has congregated at the mall. Headset microphone on, with sweat pouring from under her blonde ponytail, Sylwia is like a televangelist feeding off the audience, chanting superlatives and at times reaching a state of attention-induced ecstasy.

But after every scene that shows Sylwia’s seemingly inexhaustible online personality, we’re met with the deafening silence that follows once the camera is off – or the eerie sound of her recorded voice echoing through her empty apartment. The illusion Sylwia’s career hinges on – impenetrable self-esteem, a self-assured, sunny disposition – is repeatedly created and destroyed before our eyes as we watch her in private, yearning for human connection.

Swarmed by her adoring fans, Sylwia demonstrates how highly revered the online celebrity can become.

Would she be happier without her platform? The question goes unanswered. “As Sylwia got stronger I also stopped feeling the need to make a statement.” Von Horn said. “Is it a film that criticises social media or not? I never wanted a clear stance.”